272 Notes on Yucatan Birds. 



My opinion of its distinctness lias been fully confirmed by the 

 further comparison of the specimens now received, with exam- 

 ples of albifrons from Guatemala and also from Yucatan, whence 

 I have specimens not differing from Guatemalan ones. 



I sent an example to Mr. R. Ridgwav, of the National Museum, 

 Washington, requesting his opinion ; he wrote as follows : " En- 

 gyptila fulviventris I should regard as distinct. We have one 

 just like yours. It was obtained at Merida, by Schott, Jan. 17, 

 1865 ; "besides, I have compared them both with a series of 31 

 adult examples of E. albifrons, and find none intermediate. " 



In my original description I say : " Fore part of the head of 

 a pale bluish-white," this is not of so clear a color nor so well 

 defined as in albifrons, and has a vinous tinge ; the tail-feathers 

 are narrower than those of E. albifrons, and the white at their 

 ends less in extent ; the chin in E. albifrons is pure white, in 

 the other tinged with vinous ; the examples last received have 

 their backs of a lighter shade of olive than in albifrons, instead 

 of " rather darker " as in the description of the type, perhaps 

 the difference may be seasonal. 



Chaetura Gaumeri, Lawr., Ann. K Y. Acad. Sci., Vol. II, p. 245. 



I have received from Mr. Gaumer three more specimens of 0. 

 Gaumeri, one having the spines unworn, in which state I have 

 been desirous to get it. 



He writes of this species as follows : "I have several specimens ; 

 none of them have the spines so long as C. Yucatanica ; of this 

 latter species I have one more specimen. C. Gaumeri lives in 

 wells with rocky walls, hence the worn appearance of the spines." 



One specimen now sent is the first I have seen with perfect 

 spines. The rocky character of the places they inhabit, accounts 

 satisfactorily for the worn condition of the spines in most of the 

 specimens obtained. 



The central spines of C. Gaumeri are in length, - 0.13 in. 



The shortest outer do. do. do. - 0.5 " 



The central ones of C. Yucatanica, are do. - 0.20 " 



The outer ones, do. do. - 0.13" 



